Wood-saw



B. HATLEY.

WOOD SAW.

Axfvucmou man ma. 22.1920.

Patented Apr.'12,f1921.

s sauts-SHEET 1.

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B.HATLEY.

WOOD SAW.

APPLICATION FILED MAR. 22| 192'0.4

Patented Api; 12, 192,1.

l 3 SHEETS-SHEET-Z.

B. HATLEY.

WOOD SAW.

APPLICATION FILED MAR.22. |920 Patented Apr. 12, 1921.

UNITED STATES :BIRD HATLEY, OF EVEBSON, WASHINGTON.

WOOD-SAW.

Specification of Letters Patent.

Patented Apr. 12, 1921.

AppIication led March 22, 1920. Serial No. 367,825.

To all 'whom 5t may concern:

Be it known that I, BIRD HATLEY, a citizen of the United States,residing at Everson, in the county of Whatcom and State of Washington,have invented certain new and useful Improvements in Vood-Saws; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art towhichV it appertains to make saw, if for instance, the saw strikes anail or the like in the wood being sawed 'and it is desired to disengagethe saw from such obstruction.

The invention has for its object certain `improvements in details, goingto make up the ultimate perfection of the machine as an entirety.

The accompanying drawings clearly disclose an exemplary form of theunderlying principles of my invention.

Brieliy described:

Figure 1 is a view in side elevation of the machine.

Fig. 2 is a top plan view.

Fig. 3 is a view in end elevation looking at the right hand end of Fig.1, and

Fig. 4 is a detached detail view in perspective of the mechanism foreffecting the reversal of the direction of movement of the saw.

Referring now in detail to the drawings:

The operating parts of my machine are mounted upon a suitable base,herein shown as comprising parallel bars 1, 1, andbars 2, 2 secured atone end thereof near one end of the bars 1, 1 and disposed at an angleto the latter. All of said bars may rest upon and be secured totransversely disposed bars 3, 3.

Disposed at one end of said bars 1, 1 and 2, 2 is a platform 4. Adaptedto be detachably connected to said platform at one end thereof is arunway comprising, as shownxthe side members 5, 5, the stationarycross-pieces 6 and the rollers 7, the latter being suitably supported inbearings 8 on the side members 5, 5.

The platform 4 is provided with a transversely extending slot 9 disposeddirectly beneath the saw 10, whereby sawdust may escape.

Secured at the other end of the bars 1, 1 are upright standards 11, 11,carrying at their tops bearings 12, 12, in which is rotatably supporteda shaft 13. Said shaft carrlesat one end a pulley 14,.around which maypass a belt, not shown, passing around .another pulley on a drive shaft,constituting the power shaft. Also carried by the shaft 13, toward theend thereof carrying the pulley 14, is a second pulley 15 around which,and around a second pulley 16 on a shaft 17 at the other end-0f themachine, passes a belt 18. l

The shaft 17 is rotatably supported in bearlngs 19, 19 carried uponblocks 20, 20, secured to timbers 21, 21 rising from the base bars 2, 2,as shown most clearly in Fig. 1.

The saw 10 is fixed on a shaft 22 rotatably supported in a boss orbearing 23 at the lower end of a swinging bracket 24, provided at itsupper end with a yoke 25 pivotally suspended upon the shaft 17.

Carried by`one end of the shaft 22 `is a pulley 26 around which," andaround a pulley 27 fast on the shaft 17, is a driving belt 28. It will`thus be seenthat the movement of the pulley will be imparted through theshaft 13 to the pulley 15, thence through the belt 18 to the pulley 16,thence through the shaft 17 to the pulley 27, and thence .through thebelt 28 to the pulley 26 on the shaft 22 carrying the saw 10, whichlatter is thereby rotated.

On the end of the shaft 13, opposite the pulley 14, is a sprocket wheel29, meshing with a sprocket chain 30 passing around a secondsprocketwheel 31 on a shaft 32 rotatably supported in bearings 33, 33 onvertically disposed plates 34, 34, provided with lateral feet 35, 35,through which, and through timbers 36, 36 disposed upon the bars 1, 1and 2, 2 transversely thereof, pass securing bolts 37.

Fast on the shaft 32 is a gear wheel 38 meshing" with a pinion 39 on ashaft 40 rotatably supported in bearings carried by the side plates 34,34. Said pinion meshes with a second pinion 4l on a shaft 42, alsorotatably supported in bearings carried Vby the side plates 34, Saidpinion 4l meshes with a gear wheel 43 carried by a shaft 44 rotatablysupported in bearings upon the side plates 34, 34. Said train of gears,just described, is disposed adjacent one of the side plates 34, as shownmost clearly in Fig. 2.

Rotatably supported in the plates 34, 34, intermediate the top andbottom thereof, is a shaft 45, fast on which is a friction wheel 46adapted to frictionally engage either one of two friction pinions 47,48, rotatably carried on stub shafts 49, 49, carried by a, rocker arm 50pivoted at its lower' 4end, as shown at 5l, on the shaft At its upperend said rocker arm is articulated, as shown at 52,. with one end of anoperating member 53 extending toward the saw l0, as shown in Fig. l, soas to be within convenient reach of the operator standing near the saw.

Fast on the shaft 82 is a friction wheel 54, and fast on the shaft 44 isa similar friction wheel 55, said friction wheels 54 and 55 being in thepath of travel of the friction pinions 47 and 48 as the same are bodilyswung by means of the rocker arm 50 controlled by the operating member53.

Fast on one end of the shaft 45 is a crank 56 pivotally secured at itsend, as shown at 57, to one end of a link 58, the other end of which ispivotally'secured, as shown at 59, to a rocker bar 60, pivoted at itslower end, as shown at 6l, to one of the base bars l. At its upper endsaid rocker bar 60 is pivotally connected, as shown at 62, to one end ofa link 63 pivotally secured, as at 64, at its other end to the swingingbracket 24 carrying the saw lO. Said bracket 24 is provided with two ormore apertures 65, so that the end of the link 63 may be adjustablysecured in any one of said'apertures.

Y The operating handle 53 is provided on its under surface with aplurality of notches 66, any one of which may be 'engaged with a pin 67carried by one of the frame uprights 2l, whereby the handle may be heldagainst movement.

Pivotally secured to the operating handle 58 between the ends thereof,as shown at 68, is one end of a link 69, pivotally secured at its otherend, as shown at 70, to a brake beam or arm 7l fulcrumed intermediateits ends, as shown at 72, to one of lthe side plates 34, and carrying atits free end a brake shoe 73 adapted to be brought into frictionalcontact with the friction wheel 46 to stop the movement thereof when'theoperating handle 53 is moved into neutral position so that the frictionwheels 47 and 48 are out of contact with the friction'wheels 5.4 and 55.To effect this braking action,

Athe operating handle 53 is disengaged from thepin 67 and is pushed soas to shift the rocker arm 50 so as to disengage the friction pinions 47and 48, and simultaneously the operating handle 53 is shoved downward soas to rock the brake arm 7l on its fulcrum 72 and throw the brake shoe78 into frictional contact with the friction disk 46.

Should the saw 10 strike an obstruction, such as a nail, in the board orlog being sawed, it is desirable toreverse the rectilinear path ofmovement of the saw, so as to disengage the same from said obstruction.bvionsly, this reversal is accomplished by tilting the rocker arm 50 onits pivot 5l, so as toshi'ft the friction pinion 47 out ofengagementwith the friction disk or wheel 54, and the friction pinion 48 intoengagement with the friction disk or `What I claim to be new is: l. n awood sawing machine, the combination of a rotatable saw, and mechanismfor bodily movingY the same along a curvilinear path, comprising` arotatable crank shaft, connections between said crank shaft and saidsaw, a friction wheel fast on said crank shaft, a train of gearing,means for rotating said gear train, two friction disks rotating withsaid gear train, and two friction pinions disposed between said frictiondisks and being bodily shiftable to bring either one into frictionalcontact with the adjacent friction disk and with said friction wheel.

2. In a wood sawing machine, they combination of a rotatable saw, andmechanism for bodily moving the same along a curvilinear path,comprising a rotatable crank shaft, connections between said crank shaftand said saw, a friction wheel fast on said crank shaft, a train ofgearing, means for rotating said gear train, two friction disksrotating` with said gear train, 'and two. friction pinions disposedbetween said friction disks Aand being bodily shiftable to bring eitherone into frictional contact kwith the adjacent friction disk and withsaid friction wheel, and means for causing said shifting of thepinions,I including-a rocker arm carrying said 'pinons 3. In a' woodsawing` machine, the combination of a rotatable saw, and mechanism forbodily moving the same along a curvilinear path, comprising a rotatablecrank shaft, connections between said crank shaft and said saw, afriction wheel fast on said crank shaft, a train of gearing, means forrotating said gear train, two friction disks rotating with said geartrain, and two friction pinions disposed between said friction disksandbeing bodily shiftable to bring either one into frictional contactwith the adjacentfriction disk and with said friction wheel, and meansfor causing said shifting of the pinions, including a rocker arm car.-

rying said pinions, and an operating member pivoted to said rocker arm.

4. In a wood sawing machine, the combination of a rotatable saw, andmechanism for bodily moving the same along a curvilinear path,comprising a rotatable crank shaft, connections between said crank shaftand said saw, a friction wheel fast on said crank shaft, a train ofgearing, means for rotating said gear train, two friction disks rotatingwith said gear train, and two friction pinions disposedbetween saidfriction disks and being bodily shiftable to bring either one intofrictional contact with the adjacent friction disk and with saidfriction wheel, and means for causing said shifting of the pinions,including a rocker arm carrying said pinions, means for moving saidrocker arm to shift said pinions to an intermediate position where saidpinions are out of Contact with both of said friction disks, and meanscontrolled by said rocker-armoperating means for braking said frictionwheel.

5. In a wood sawing machine, the combination of a rotatable saw, andmechanism for bodily moving the same along a curvilinear path,comprising a rotatable crank shaft, connections between said crank shaftand said saw, a friction wheel fast on said crank shaft, a train ofgearing, means for rotating said gear train, two friction disks rotatingwith said gear train, and two friction pinions disposed between saidfriction disks and being bodily shiftable to bring either one intofrictional Contact with the adjacent friction disk and with saidfrietion wheel, and means for causing said shifting of the pinions,including a rocker arm carrying said pinions, an operating memberpivoted to said rocker arm for throwing the same to shift said pinion toan intermediate position where saidv pinions are out of contact withboth of said friction disks, and means controlled by a downward movementof said operating member for braking said friction wheel.

In testimony whereof I hereunto aiiix my signature.

BIRD HATLEY.

